Is there a webpage with illustrations and well formed explanations on such as mol, g/mol, Mm etc etc? The Norwegian word for this part of chemistry is støkiometri. I believe it is something like stochiometry in english even though that sounds too odd. I had a test on this today and I believe I am near failing. I do know much about this subject, but everything dropped out of my head when I got the test. I am grateful for any help!